*{
    margin: 0;
    padding: 0;
}
body{
    font-family: 微软雅黑;
}


.main_content{
    position: relative;
    top:10px;
    width: 1150px;
    height: 446px;
    margin: 0 auto;
    border-radius: 5px;
    box-shadow: 0 12px 24px 0 rgba(7,17,27,.2);
}
.nav_div{
    position: relative;
    width: 218px;
    height: inherit;
    float: left;
    border-bottom-left-radius:5px ;
    border-top-left-radius:5px ;
    background-color: #292929;
}
.nav{
    width: 218px;
    height: inherit;
    margin-top: 6px;
}

.nav li{
    width: 218px;
    height: 62px;
    line-height: 62px;
    font-size: larger;
    list-style: none;
}
.nav li .child_menu{
    position: absolute;
    left: 218px;
    top:0;
    width: 932px;
    height: 446px;
    background-color: red;
    z-index: 1;
    display: none;
}
.nav span:hover{
    background: rgba(166, 163, 165, 0.47);
    color: #ffffff;
}

.nav a{
    text-decoration: none;
    color: inherit;
}
.nav span{
    display: block;
    width: 178px;
    height: inherit;
    margin-left: 12px;
    border-bottom-left-radius:5px ;
    border-top-left-radius:5px ;
    padding: 0 14px;
    color: rgba(199, 197, 199, 0.52);
}
.nav a:hover{
    color: #ffffff;
    display: block;
}

.carousel{
    position: relative;
    width: 932px;
    float: left;
    height: inherit;
    margin-top: -2px;
}
.carousel .carousel_ul{
    width: inherit;
    height: inherit;
    list-style: none;
}
.carousel .carousel_ul li{
    position: absolute;

    width: inherit;
    height: inherit;
    display: none;
}
.carousel img{
    display: block;
    width: inherit;
    height: inherit;
}
.circle{
    position: absolute;
    margin: 0 auto;
    width: 72px;
    height: 6px;
    top: 400px;
    left: 430px;
    list-style: none;
}
.circle li{
    width: 6px;
    height: 6px;
    border-radius: 3px;
    background-color: #000000;
    margin: 0 3px;
    float: left;

}